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Re: In defence of 404 ...

From: Eric van der Vlist <vdv@dyomedea.com>
Date: Tue, 08 Aug 2006 23:36:13 +0200
To: Dan Connolly <connolly@w3.org>
Cc: Bernard Vatant <bernard.vatant@mondeca.com>, semantic-web@w3.org, Franck Cotton <franck.cotton@insee.fr>
Message-Id: <1155072974.26048.17.camel@localhost>
Le mardi 08 août 2006 à 15:55 -0500, Dan Connolly a écrit :
> On Tue, 2006-08-08 at 22:37 +0200, Eric van der Vlist wrote:
> > Le mardi 08 août 2006 à 14:09 -0500, Dan Connolly a écrit :
> > > On Tue, 2006-08-08 at 19:02 +0200, Bernard Vatant wrote:
> > 
> > > > > Note that what the tabulator will do is follow both seeAlso links
> > > > > and merge the data from DOC1 and DOC2. That seems consistent
> > > > > with what you intend: "equally normative".
> > > > >
> > > > >   
> > > > Yes. But it might happen that the merged data are not consistent,
> > > > although of course separately DOC1 and DOC2 should be.
> > > 
> > > That's not what "equally normative" means to me; "equally normative"
> > > implies consistent, no?
> > 
> > We might have two different issues.
> > 
> > Short term, yes DOC1 and DOC2 will give complementary and consistant
> > descriptions of the same set of entities.
> 
> Ah... good.
> 
> > Longer term, if we want to publish several versions of these data we
> > will have to figure out how we would like to express all that.
> 
> Yes, that's an interesting puzzle.

Yes. I haven't had the opportunity to think about it in RDF world, but I
have had to cope with this type of history issues in a prior life and
they become rapidly very complex.

> >  Including
> > rdfs:seeAlso references to different versions of the same data could
> > lead to include inconsistent descriptions and I think that this is what
> > Bernard means. 
> 
> In that case, I hope we can use something more refined than seeAlso
> to say "well, here's the newer version, i.e. the version I'm most
> actively supporting today, though I still stand by this old version.
> I don't promise you can use them together at the same time to
> get something sensible." and maybe the tabulator can be taught
> to discriminate.

Yes, something similar to what OWL uses for its own purpose
(owl:priorVersion) would be nice. It would also be interesting to attach
a date to a data set.

This seems to be a rather generic issue. Are you aware of anything that
we could borrow for this kind of issues?

Thanks,

Eric
> 
> > Eric
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Received on Tuesday, 8 August 2006 21:36:30 UTC

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